Category Archive: Science

Oct 20

H2O ice as superconductor? yes, superconducting water !

We have recently investigated the possibility of achieve high-temperature superconductivity in hydrides under pressure by inducing metallization of otherwise insulating phases through doping, a path previously used to render standard semiconductors superconducting at ambient pressure. Following this idea, we study HO, which is one of the most abundant and well-studied substances in the universe! We …

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Jun 07

First Superhydrides meeting in Rome

In past May (2016) I attended the first edition of the International Workshop in “Superhydrides  Towards Room Temperature Superconductivity: Hydrides and More” . This was a very important meeting because it gathers the world-wide experts (experimentalists and theoreticians) in this matter. The urgent of the meeting was motivated by the 200 K superconductivity discovered only …

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Apr 03

International collaboration demonstrates reliability of quantum simulations for materials design

An international collaboration with colleagues from over 30 universities and institutes to investigated to what extent quantum simulations of material properties agree when they are performed by different researchers and with different software. Thanks to an online collaboration, they successfully demonstrated that the most recent generations of codes agree well, in contrast to earlier generations. …

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Jan 28

Google’s neural network beats humans at the ancient game of Go

A neural net system built by Google has beaten the European champion in the Chinese game of Go, winning five out of five games and crossing a new threshold for machine intelligence. In a recent paper published in Nature,  DeepMind researchers revealed how the system was constructed and how it was able to succeed where …

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Jan 09

New hints on the metallization of Hydrogen

Recently scientist from the Edinburgh’s Centre for Science at Extreme Conditions  have come close to creating a long-sought new state for hydrogen. The group used a set-up called a diamond anvil cell to compress its sample of molecular hydrogen. This apparatus is essentially two gems that have been placed in opposition to each other. Their …

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Dec 07

Yet another superconductor above 100 K ?

Following the recent discovery of very high temperature conventional superconductivity in sulfur hydride (critical temperature Tc of 203 K). Experimentalist have shown results on the covalent hydride phosphine (PH3) which also exhibits a high Tc > 100 K at pressure P > 200 GPa. However, neither the exact composition nor the crystal structure of the …

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Aug 27

Superconductivity under high pressure at minus 70 degrees Celsius

Researchers at the Max Planck Institute for Chemistry in Mainz and the Johannes Gutenberg University Mainz observed that hydrogen sulfide becomes superconductive at minus 70 degree Celsius —when the substance is placed under a pressure of 1.5 million bar. This corresponds to half of the pressure of the earth’s core. With their high pressure experiments …

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Mar 27

Superconductivity in group-IV honeycomb materials

Our work has just been published in Physical Review B  ! In this theoretical work, we studied in detail the electron-phonon superconductivity of honeycomb MX layered structures where X is one element of group IV (C, Si, or Ge) and M is an alkali or an alkaline-earth metal.  Among the studied compositions we predict a …

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